mpris_player: never show app icon

src/controlCenter/widgets/mpris/mpris_player.ui

@@ -18,8 +18,9 @@
           <object class="GtkImage" id="album_art">
             <property name="visible">True</property>
             <property name="can-focus">False</property>
-            <property name="pixel-size">96</property>
-            <property name="use-fallback">False</property>
+            <property name="pixel-size">48</property>
+            <property name="icon-name">audio-x-generic-symbolic</property>
+            <property name="use-fallback">True</property>
             <property name="icon_size">0</property>
           </object>
           <packing>

src/controlCenter/widgets/mpris/mpris_player.vala

@@ -272,6 +272,18 @@ namespace SwayNotificationCenter.Widgets.Mpris {
                     return;
                 }
             }
+            // Get the app icon
+            Icon ? icon = null;
+            if (desktop_entry is DesktopAppInfo) {
+                icon = desktop_entry.get_icon ();
+            }
+            if (icon != null) {
+                album_art.set_from_gicon (icon, mpris_config.image_size);
+            } else {
+                // Default icon
+                album_art.set_from_icon_name ("audio-x-generic-symbolic",
+                                              mpris_config.image_size);
+            }
         }
 
         private void update_button_shuffle (HashTable<string, Variant> metadata) {